1 - amino - 2 - dihydroxyphenylalkanoyl-aminoalkylamino - 4 - hydroxy-anthraquinones



United States Patent U.S. Cl. 260-377 9 Claims ABSTRACT OF THE DISCLOSURE The present invention relates to novel 1-amino-4-hydroxy-anthraquinone dye developers (dyes which are also silver halide developing agents).

A primary object of this invention is to provide novel compounds of the foregoing description.

This application is a division of U.S. application Ser. No, 331,721, tiled Dec. 19, 1963, now U.S. Patent 3,347,- 672.

Other objects of the invention will in part be obvious and will in part appear hereinafter.

The invention accordingly comprises the products possessing the features, properties and the relation of elements which are exemplified in the following detailed disclosure, and the scope of the application of which will be indicated in the claims.

For a fuller understanding of the nature and objects of the invention, reference should be had tothe following detailed description taken in connection with the accompanying drawing wherein:

FIGURE l is a graphic illustration comparing the spectrophotometric curves of the magenta dye developers of this invention with a prior class of magenta dye developers.

U.S. Patent No. 2,983,606, issued May 9, 1961 to Howard G. Rogers, discloses diffusion transfer processes wherein a photographic negative material, such as a photographic element comprising an exposed silver halide emulsion, is developed in the presence of aj dye developer to impart to an image-receivingl layer a reversed or positive dye image of the developed image by permeating into said emulsion a suitable liquid processing composition and bringing said emulsion into superposed relationship with an appropriate image-receiving layer. The inventive concepts herein set forth provide novel dye developers for use in such processes.

The novel dye developers of his invention are anthraquinone dyes having the formula:

wherein each Z may be hydrogen, a hydroxy or an amino group; X and X1 are alkylene radicals which may be the same or different and are preferably lower alkylene radicals; and Y is a dihydroxyphenyl silver halide developing radical, e.g., p-dihydroxyphenyl, o-dihydroXyphenyl or halogen or alkyl substituted derivatives thereof.

In the preferred embodiment, X is an alkylene radical having 3 to 6 carbon atoms and X1 is an alkylene radical having l to 4 carbon atoms.

Alkylene radicals of greater length may be also em- 3,491,127 Patented Jan. 20, 1970 ployed, providing that the resulting dye developer is capable of being dissolved in the liquid processing composition described herein and its oxidation product rendered immobile.

As examples of suitable dye developers within the scope of Formula A, mention may be made of the following:

propylamino -4-hydr0xy-anthraquin0ne O NH2 Il I O CH3 (4) l-amino-2-('y-homogentisamido-propylamlno)-4-hydroxyanthraquinone NH2 OH OH H- 0 NH2 OH ll l 0 l CH) H n (8) 1-amino-2- ('y- [2,5dihydroxy-hydrocinnamido] -propylamino) -4-hydroxy-anthraquinone O NH2 (9) l-amino-Z- ('v- [a-methyl-3,4-dihydroxy-hydrocinnamido] propylamlno -4-hydroxy-authraquiuone O NH2 O Il 0 NH2 Il 0 CH,

0H (n) Nm (14) 1-amino-2- zeta- ['3,4.-dihydroxy-hydrocinnamido] hexylamino -4-hydroxy-anthraquin0ne o NH, 0H

Il l fl? CH3 l NH-(cHm-NH-o-bH-CH o H H The dye developers of this invention may be prepared by reacting an anthraquinone of the formula:

(B) Z (Il) NH2 \H/ Z O H wherein R is a suitable halogen, preferably bromine, or a phenoxy group, e.g.,

etc.; with a compound of the formula:

(C) NHT-X-NH2 to form a compound of the formula:

(D) z (u) NH,

NH-X-NHH Z i H and thereafter reacting the compound of Formula D with a suitable derivative, e.g., the lactone, of an acid of the formula:

(E) HOOC-Xl-Y to form a compound of Formula A.

It will be appreciated that in Formulae B-E, Z, X, X1 and Y have the meanings heretofore noted.

The compounds of Formulae B, C and E are known in the art and per se comprise no part of the present invention.

The preparation of compounds Within the scope of Formula D is described and claimed in copending application Ser. No. 627,853, led Apr. 3, 1967 in the name of J. F. Downey, a continuation-impart of application Ser. N0. 331,960, filed Dec. 19, 1963, and now abandoned.

As examples of useful compounds within the scope of Formula B, mention may be made of:

O NH3 O NH2 l-amno-Z- p-chlorophenoxy) -4-hydroxy-auth1-aquinone OH (III) ITTHQ NH2 0 H 2-chloro-1,5diamino4,8-dihydroxy-anthraquinone im /\I o O OH As examples of useful compounds within the scope of Formula C, mention may be made of:

NH2-( CH2 e-*NHz hexylene diamine NHz- CH2 3NH2 trimethylene diamine NH2-(CH2)4-NH2 tetramethylene diamine As examples of useful compounds within the scope of Formula E, mention may be made of I-CHz-COOH homogentisic acid p-dihydroxyhydrocinnamlc acid l CH3 a-methyl-2,5-dihydroxy-hydroclnnamic acid a-ethyl-2,5-dihydroxy-hydrociunamic acid H O C Hg- C O O H 3,4-dihydroxyphenylacetlc acid H0 CHz-CHz-C O OH 3,4-dlhydroxyhydrocinnarnic acid The following nonlimiting examples illustrate the preparation of novel dye developers within the scope of this invention z EXAMPLE l product was reslurried in hexane and filtered. The resulting filter cake was reslurried in water and ltered. This material from the water-washing was crystallized from methyl alcohol to yield 4.9 grams of lamino2(zeta amino-hexylamino) 4 hydroxy-anthraquinone, which melted at 193-196 C., and had the following structural formula:

A mixture of 13.3 grams of 1-amin0-2-(zeta-aminohexylamino)-4-hydroxy-anthraquin0ne (prepared in the foregoing manner), 7.5 grams of a-ethyl-2,5dihydroxyhydrocinnamic acid lactone and 1020 cc. of toluene was heated on a steam bath for 20 hours. The resulting product was filtered and washed with hot toluene. The dried filter cake gave 15.9 grams of 1amino2(zeta[ot-ethyl- 2',5 dihydroxy hydrocinnamido] hexylarnino)4hydroxy-anthraquinone, which melted at 209-2127 C.; had a spectral absorption curve with Rmx' at 528 and 565 mu in methyl Cellosolve; e528=20,600 and e565=20,000, and had the following structural formula:

(I) NH2 ?H EXAMPLE 2 A mixture containing 30 cc. of 1,3-diamino-prbpane and 3 grams of 1amino-Z-phenoxy-4-hydroxy anthraquinone was heated on a steam -bath for 20 minutes and then poured into four liters of water. The resulting precipitate when ltered and dried gave 2.2 grams of l-amino-Z- [yf-amino-propylamino]-4-hydroxy anthraquinone, which melted at 211-213 C. on crystallization from methanol, and had the following structural formula:

O NH3 A mixture containing 1.0 gram of 1-amino-2-[7-aminopropylamino]-4-hydroxy-anthraquinone (prepared in the foregoing manner), 0.65 gram of a-ethyl2,5dihydr0xy hydrocinnamic acid lactone and cc. of toluene was heated on a steam bath for 20 hours. The mixture was allowed to cool to room temperature; the resulting product was filtered and Washed with toluene. The dried lter cake gave 1.2 grams of 1-amino-2-(fy-[a-ethyl-2',5'dihy droxy hydrocinnamido] propylamino) 4 hydroxyanthraquinone, which melted at 22S-228 C.; had a spectral absorption curve with Amax. at 529 and 567 mp. in methyl Cellosolve; e529=21,800 and e567=20,800, and had the following structural formula:

EXAMPLE 3 A mixture of 1.0 gram of l-amino-ZM-amino-propylamino]-4-hydroxy-anthraquinone (prepared as described in Example 2), 0.65 gram of amethyl-2,5dihydrOxy-hydrocinnamic acid lactone and 100 cc. of toluene was heated on a steam bath for 20 hours. The resulting product was ltered and washed with toluene. The dried iilter cake gave 1.2 grams of 1amino2('y-[a-methyl-2,5 hydroxy-hydrocinnamido] propylamino) 4 hydroxyanthraquinone, which melted at 22S-228 C.; had a spectral absorption curve with Am, at 529 and 567 my. in methyl Cellosolve; e529=2l,800 and e567=20,800, and had the following structural formula:

(n) NH; @A l( EXAMPLE 4 A mixture containing 2.0 grams of 1-amino-2-[fyamino-propylamino]-4-hydroxy-anthraquinone (prepared as described in Example 2), 2.0 grams of homogentisic acid lactone and 200 co. of methyl Cellosolve was heated on a steam bath for 20 hours under nitrogen. A deaerated solution of 2.0 grams of sodium hydroxide in 20 cc. of water was added to hydrolyze the excess lactone. Carbon dioxide was bubbled into the resulting mixture until neutral. The reaction mixture was poured into 2 liters of water. The resulting product `-was ltered of and washed with water to yield 2.7 grams of l-amino-Z-(fy-homogentisamido-propylamino)-4-hydroxy anthraquinone, which melted at 187-199 C.; had a spectral absorption curve with 7mm., at 527 and 565 my. in methyl Cellosolve; and had the following structural formula:

NH2 OH EXAMPLE 5 A mixture containing 2.0 grams of l-amino-Z-(zetaamino hexylamino) -4-hydroxy-anthraquinone (prepared as described in Example 1), 2.0 grams of amethyl-2,5 dihydroxy-hydrocinnamic acid lactone and 200 cc. methyl Cellosolve was heated on a steam bath for 20 hours under nitrogen. A deaerated solution of 2.0 grams of sodium hydroxide in 20 cc. of water was added to hydrolyze the excess lactone. Carbon dioxide was bubbled into the resulting mixture until neutral. The reaction mixture was poured into 2 liters of water. The resulting product was ltered off and washed with water to yield 2.1 grams of 1-amino-2-(zeta-[a-methyl 2,5 dihydroxy-hydrocinnamido]-4-hydroxy-anthraquinone, which melted at 140- 164 C.; had a spectral absorption curve with Amm at 529 and 565 mit in methyl Cellosolve; and had the following structural formula:

0H O CH3 I EXAMPLE 6 A mixture containing 2.0 grams of l-amino-Z-(zetaaminohexylamino)-4-hydroxy-anthraquinone (prepared as described in Example 1), 2.0 grams of 2,5-dihydroxyhydrocinnamic acid lactone and 200 cc. of methyl Cellosolve was heated on a steam bath for 20 hours under nitrogen. A deaerated solution of 2.0 grams of sodium hydroxide in 20 cc. of water was added to hydrolyze the excess lactone. Carbon dioxide was bubbled into the resulting mixture until neutral. The reaction mixture was poured into 2 liters of water. The resulting product was filtered off and washed with water to yield 2.1 grams of 1 amino 2 (zeta [2',5'-dihydroxy-hydrocinnamido] hexylamino)-4-hydroxy-anthraquinone, which melted at 134-142 C.; had a. spectral absorption curve with max at 527 and 565 mit in methyl Cellosolve; and had the following structural formula:

O NH3 O H Il (u) l NH- (CH2) -NH-C-CHz-CH EXAMPLE 7 A mixture containing 2.0 grams of l-amino-Z-(zetaaminohexylamino)4hydroxyanthraquinone (prepared as described in Example 1), 2.0 grams of homogentisic acid lactone and 200 cc. methyl Cellosolve was heated on a steam bath for 2O hours under nitrogen. A deaerated solution of 2.0 grams of sodium hydroxide in 20 cc. of water was added to hydrolyze the excess lactone. Carbon dioxide was bubbled into the resulting mixture until neutral. The reaction mixture was poured into 2 liters of water. The resulting product was filtered olf and washed with water to yield 2.4 grams of 1-amino2(zetahomo gentisamido-hexylamino)4hydroxyanthraquinone which melted at 134-142 C., and had the following structural formula:

O NH2 (I) The -following examples of the photographic utilization of the dye developers of this -invention are given for purposes of illustration only.

EXAMPLE 8 A photosensitive element was prepared by coating a gelatin subcoated lm base at a speed of 10 feet/minute with a solution comprising 0.15 gram of l-amino-Z-(zeta- [a ethyl-2,5'dihydroxy-hydrocinnamido]hexylamino)- Vll-hydroxy-anthraquinone (Formula 1) dissolved in 5 cc.

of 2% cellulose acetate hydrogen phthalate in a 50:50 mixture, by volume, of acetone and tetrahydrofuran. After this coating dried, a green-sensitive silver iodobromide emulsion was coated on at a speed of 5 feet/minute and allowed to dry. This photosensitiveelement was exposed for 2 seconds and processed by spreading, between the thus exposed photosensitive element and a superposed imagereceiving element, an aqueous processing composition compnsmg:

The image-receiving element was prepared in accordance with the disclosure of the copendng application of Edwin H. Land, Ser. No. 234,864, filed Nov. 1, 1962, and comprised a layer of a 2:1 mixture, by weight, of polyvinyl alcohol and poly-4-vinylpyridine, a layer of polyvinyl alcohol, and a layer of a half-butyl ester of poly- EXAMPLE 9 The procedure described in Example 8 was repeated, except that the dye developer was dispersed in a layer of gelatin. The coating solution from which the dye developer layer was coated was prepared by dissolving 0.40 gram of the dye developer in 0.50 cc. of N-n-butylacetanilide and 0.75 cc. of triethyl phosphate, and agitating this mixture in a Waring Blendor for one minute with a solution of 3.40 grams of 10% gelatin solution, 0.80 cc. of water, and 0.70 cc. of Alkanol B. 4 cc. of the resulting dye dispersion was added to 9 cc. of water containing 2.00 ce. of 12% aqueous saponin, and then coated on the gelatin subcoated film base at a speed of 10 feet/minute. Exposure and processing in the manner described in Example 8 yielded a magenta positive transfer image.

EXAMPLE 10 A photosensitive element was prepared by coating a gelatin subcoated film base at a speed of 10 feet/minute with a solution comprising 0.20 gram of 1-amino-2-(fy-[aethyl 2,5' dihydroxy-hydrocinnamido]-propylarnino) 4-hydroxy-anthraquinone (Formula 2) dissolved in 5 cc. of 2% cellulose acetate hydrogen phthalate in a 50:50 mixture, by volume, of acetone and tetrahydrofuran. After this coating dried, a green-sensitive silver iodobromide emulsion was coated on at a speed of 5 feet/ minute and allowed to dry. Exposure and processing in the manner described in Example 8 gave a magenta positive transfer image.

The addition of 0.2 gram of 4methylphenylhydro quinone to the processing solutions of Examples 8-10 gave comparable magenta images which had an appreciably lower Dmm.

Substitution in the procedures described in Examples 8-10 of the other dye developers whose preparations are described above gave similar positivetransfer images.

Prior to the present invention, it had not been thought possible to prepare compounds within the scope of Formula A. In other words, it was not thought possible by one skilled in the art that reacting a compound of Formula B with a compound of Formula C would produce an amino substituent placed ortho to the amino group on the 1-amino-4-hydroxy-anthraquinone nucleus of Formula D, since attempts to substitute an `amino group in the 2-position of a 1,4-diamino-anthraquinone have been unsuccessful.

Where each Z of Formula A is hydrogen, the resulting compounds are magenta dye developers possessing excellent stability and spectral absorption characteristics. In photographic processes such as are described and claimed in the aforementioned U.S. Patent No. 2,983,606, particularly in such processes for preparing multicolor images, it is extremely desirable that the dye developers employed possess the desired spectral absorption characteristics, as well as being stable to light, heat and humidity, so as to provide a stable image of the desired color. As is frequently the case, a magenta dye of the proper color, e.g., having the proper blue transmission, may not possess the desired stability. Conversely, magenta dyes having good light stability frequently are not of the proper color, especially for use in multicolor processes.

The magenta dye developers of the present invention are of particular value in that they are both highly stable and exhibit excellent color for use in preparing color images, particularly multicolor images where optimum color reproduction is desired.

Thus, while the magenta dye developers of this invention are neither the most stable heretofore known nor do they possess the most optimum spectral absorption characteristics, they are unusual in that they combine these properties to a high degree so as to provide magenta dye developers extremely useful in the aforementioned photographic processes and products, particularly in such products and processes for preparing multicolor images.

As shown in FIGURE 1, the spectrophotometric curve of a typical magenta dye developer of this invention, specifically l amino-2-(zeta-[u-ethyl-2,5dihydroxyhydro cinnamido]hexylamino)-4-hydroxy-anthraquinone, (solid line) is compared with a typical 2-alkoxy-l,4diamino anthraquinone magenta dye developer of the prior art,

l'cinnamido] -pentoxy) anthraquinone (dotted line), the solvent in each case being methyl Cellosol. The lastnamed dye developer and analogous 2-alkoxy-anthraquinone dye developers are described and claimed in the copending application of John F. Downey and Myron S. Si-mon, Ser. No. 152,014, filed Nov. 13, 1961.

While only a single species of each class of dye developer has been shown for purposes of comparison, it will be understood that the various species of the chromophoric systems illustrated in the drawing have substantially identical curves.

It will ybe observed that the Amm of the dye developers of this invention are shifted more towards the violet or a lower wavelength in the visible spectrum, and they have less absorption in the red region and more absorption in the green region of the spectrum. More specifically, the dye developer of this invention (solid line) has a spectral absorption curve with max, at 528 and 565 ma; e528=20,600 and e565=20,000; while the prior 2-alkoxy dye developer (dotted line) has a spectral absorption curve with Amax, at 534 and 572 ma; e534==16,300; E572:17,400.

The difference in spectral absorption characteristics illustrated in the graph permits the magenta dye developers of this invention to afford more desirable color balance or accuracy of color reproduction in multicolor images prepared in the manner heretofore described.

The dye developers of this invention are also useful in integral multilayer photosensitive elements for use in multicolor diffusion transfer processes. VAs an example 0f such photosensitive elements, mention may be made of the photosensitive elements disclosed and claimed in the copending U.S. application of Edwin H. Land and Howard G. Rogers, Ser. No. 565,135, filed Feb. 13, 1956, wherein at least two selectively sensitized photosensitive strata are superposed on a single support and are processed, simultaneously and without separation, with a single common image-receiving element. A suitable arrangement of this type comprises asupport carrying a red-sensitive silver halide emulsion stratum, a green-sensitive silver halide emulsion stratum and a blue-sensitive silver halide emulsion stratum, said emulsions having associated therewith, respectively, a cyan dye developer, a magenta dye developer and a yellow dye developer. In one of the preferred embodiments of photosensitive elements of this type, the dye developers are disposed in separate alkali-permeable layers behind the photosensitive silver halide emulsion stratum with which they are asso ciated.

The photosensitive elements within the scope of this invention may be used in film units which contain a plurality of photosensitive frames. The photosensit-ive elements of this invention are especially useful in composite roll film and film pack structures intended for use in a Polaroid Land Camera, sold by Polaroid Corporation, Cambridge, Mass., or a similar camera structure such, for example, as the roll film type camera forming -the subject matter of U.S. Patent No. 2,435,717, issued to Edwin H. Land on Feb. 10, 1948, or the film pack camera structure shown in U.S. Patent No. 2,991,702 issued to Vaito K. Eloranta on Juyl 1l, 1961. In general, such composite roll films comprise a photosensitive roll, a roll of image-receiving material and a plurality of pods containing an aqueous alkaline processing solution. The rolls and pods are so associated with each other that, upon processing, the photosensitive element may be superposed on the image-receiving element and the pods may be ruptured to spread the aqueous alkaline processing solution between the superposed elements. The nature and construction of the pods used in such units are well known to the art. See, for example, U.S. Patents Nos. 2,543,181 and 2,634,- 886, issued to Edwin H. Hand.

The dye developers herein set forth are also useful in the formation of colored images in accordance with the photographic products and processes described and claimed in U.S. Patent No. 2,968,554, issued to Edwin H. Land on Ian.17,1961.

The novel compounds herein disclosed are also suitable for use as dyes for textile fibres, such as nylon.

Since certain changes may be made in the above products without departing from the scope of the invention herein involved, it is intended that all matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.

What is claimed is:

1. A compound of the formula:

wherein each Z is selected from the group consisting of hydrogen, hydroxy and amino; X and X1 are lower alkylene; and Y is oor p-dihydroxyphenyl.

2. A compound as defined in claim 1 wherein each Z is hydrogen.

4. 1-amino-2-(fy-[a-ethyl 2',5 dihydroxy hydrocinnamido] -propylamino) -4-hydroxy-anthraquinone.

5. 1-amino-2-('y-[a-methy12,5dihydroxy hydrocinnamido] -propylamino -4-hydroxy-anthraquinone.

6. 1amino2(y-homogentisamido propylarnino) 4- hydroxy-anthraquinone.

7. 1-amino-2-(zeta[a-rnethyl-2,5 dihydroxy hydrocinnamido] -hexy1amino) -4-hydroxy-anthraquinone.

9. 1-amino-2-(zeta-homogentisamido hexylamino) 4- hydroxy-anthraquinone.

References Cited UNITED STATES PATENTS 2,983,606 5/1961 Rogers 96-29 3,255,001 6/ 1966 Blout 96-29 LORRAINE A. WEINBERGER, Primary Examiner H. C. WEAVER, Assistant Examiner U.S. C1. X.R. 96--29; 260-380 

